blob: 7518879217e2e0e03038b93473222ac37581ea58 [file] [log] [blame]
Yushin Cho77bba8d2016-11-04 16:36:56 -07001/*
2 * Copyright (c) 2001-2016, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
Nathan E. Egge1078dee2016-03-06 10:59:29 -050011
James Zerne1cbb132018-08-22 14:10:36 -070012#ifndef AOM_AOM_DSP_ENTCODE_H_
13#define AOM_AOM_DSP_ENTCODE_H_
Sebastien Alaiwan148f6e62018-03-02 15:31:59 +010014
Nathan E. Egge1078dee2016-03-06 10:59:29 -050015#include <limits.h>
16#include <stddef.h>
17#include "av1/common/odintrin.h"
Thomas Daede837262b2017-11-06 20:07:01 -080018#include "aom_dsp/prob.h"
Nathan E. Egge1078dee2016-03-06 10:59:29 -050019
Thomas Davies736ddef2017-11-09 09:46:08 +000020#define EC_PROB_SHIFT 6
21#define EC_MIN_PROB 4 // must be <= (1<<EC_PROB_SHIFT)/16
Thomas Davies736ddef2017-11-09 09:46:08 +000022
Nathan E. Egge1078dee2016-03-06 10:59:29 -050023/*OPT: od_ec_window must be at least 32 bits, but if you have fast arithmetic
24 on a larger type, you can speed up the decoder by using it here.*/
25typedef uint32_t od_ec_window;
26
Wan-Teh Changed997ab2018-08-14 12:35:17 -070027/*The size in bits of od_ec_window.*/
Nathan E. Egge1078dee2016-03-06 10:59:29 -050028#define OD_EC_WINDOW_SIZE ((int)sizeof(od_ec_window) * CHAR_BIT)
29
Nathan E. Egge1078dee2016-03-06 10:59:29 -050030/*The resolution of fractional-precision bit usage measurements, i.e.,
31 3 => 1/8th bits.*/
32#define OD_BITRES (3)
33
Thomas Daede837262b2017-11-06 20:07:01 -080034#define OD_ICDF AOM_ICDF
Timothy B. Terriberry41b4f752017-03-07 17:45:30 -080035
Nathan E. Egge1078dee2016-03-06 10:59:29 -050036/*See entcode.c for further documentation.*/
37
38OD_WARN_UNUSED_RESULT uint32_t od_ec_tell_frac(uint32_t nbits_total,
39 uint32_t rng);
40
James Zerne1cbb132018-08-22 14:10:36 -070041#endif // AOM_AOM_DSP_ENTCODE_H_